Research Description: I am primarily interested in photoneutron angular distributions during active interrogation with the High Intensity Gamma ray Source (HIGS). Prompt neutrons are emitted via the (gamma, n) and (gamma, fission) reactions. By using linearly polarized photons, we can investigate asymmetries in the angular distributions, and these asymmetries may be of use in uniquely identifying the isotopic composition of the target material. A potential application of this research is the development of a method of actively interrogating cargo containers in US ports for fissionable materials.